title: Risk in elderly patients after stentless versus stented aortic valve surgery.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001022:Aortic Valve Insufficiency / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000601:surgery; D005260:Female; D015577:Geriatric Assessment; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008297:Male; D011379:Prognosis; D011474:Prosthesis Design; D018570:Risk Assessment; D015607:Stents; D016896:Treatment Outcome